Our nails grow at a rate of around 0.1 mm per day. So it would take roughly 3 months to replace an entire fingernail. Synesthesia is a rare condition where the human senses are combined. Synesthetes can 'see' words, 'taste' colors and shapes, and 'feel' flavors. The velocity of your cough can be up to 60mph. Like a finger print, every person has a unique tongue print. If the amount of water in your body is reduced by just 1%, you'll feel thirsty. Our eyes are always the same size from birth. If all your DNA is stretched out, it would reach to the moon 6,000 times. What do people fear most? At the top of the list is death, the fear of which is necrophobia. Second, apparently, is the fear of failure, which is called kakorrhaphiophobia. India has the largest number of diabetics in the world; a total of 10 million. When you wake up in the morning and find crusty stuff in your eyes, that is essentially the same as the stuff in your nose. The average human scalp ...